Right Pyramids, Right Cones and Spheres (Grade 10 NSC Matric Mathematics): Flashcards

Pyramid with apex-to-base-centre line perpendicular to base

Single point where triangular faces meet at top

Round 3D shape, all surface points equidistant from centre

Height: perpendicular to base; Slant: diagonal along face

$4\pi r^2$

$\frac{4}{3}\pi r^3$

$\pi r(r + h)$

$\frac{1}{3} \times \pi r^2 \times H$

One-third of base area times height

$s^2 = H^2 + r^2$